freezing and condensation
Explanation:
The motion of the atoms decreases during freezing and condensation. These are phase changes that increases the molecular attraction between particles and forces them to come closer.
Freezing is a phase change from liquid to solid. It is usually achieved by removing heat from a substance and cooling it.
Condensation is a phase change from gases to liquid. .
Gases have the greatest motion because they have little to no attractive forces between them.
Phase changes from gas to solid to liquid generally reduces the motion of the atoms.
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Answer:
B.) a cation that is smaller than the original atom
Explanation:
When the atoms of an element gains or loses electrons, it becomes charged. This charged atom is called an ION. An ion can either be a CATION or ANION depending on whether the atom loses electrons to become positively charged (cation) or gains electrons to become negatively charged (anion).
In this case, magnesium (Mg) atom gives up or loses electron(s) to become an ion, it will become positively charged and hence called a CATION. However, since it loses electrons in its atom, it becomes SMALLER than the original magnesium atom. This is because the electrons left in the atom becomes more attracted to the nucleus and decreases the ionic radius.
The answer is B. The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
Alkanes represent one family of organic compounds that is composed of carbon and hydrogen.
Alkanes are organic compounds that solely have hydrogen and carbon atoms in single bonds and do not have any additional functional groups. Alkanes can be divided into three groups: cycloalkanes, branched alkanes, and linear straight-chain alkanes.
The general formula for alkanes is CnH2n+2. Alkanes are also saturable hydrocarbons. Cyclic hydrocarbons like cycloalkanes have rings-shaped arrangements of their carbon atoms.
Therefore, Alkanes are an example of an organic chemical family made of carbon and hydrogen.
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